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. 2021 Jan 25;13:62. doi: 10.1007/s40820-020-00578-z

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© The Author(s) 2021

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Fig. 1 — Potential elements to substitute Pb. The orange shading on the periodic table marks the screened elements by Filip et al. that can replace Pb. The green shading of the VA group heterovalent elements and the blue shading of transition metal elements have also been calculated or proved to substitute Pb. (Color figure online)